NXQ1TXA5_SDS Datasheet, PDF (1/15 Pages) NXP Semiconductors – One-chip 5 V Qi wireless transmitter

NXQ1TXA5
One-chip 5 V Qi wireless transmitter
Rev. 1.2 — 10 September 2015
Product short data sheet
1. General description
The NXQ1TXA5 is a controller/driver IC for a 5 V Qi-certified/compliant low-power
wireless charger. It offers a fully integrated solution that includes a 5 V full-bridge power)
stage, as defined in Wireless Power Consortium (WPC) 5 V Qi standards A5, A11, A12
and A16.
The NXQ1TXA5 uses dedicated analog ping circuitry to detect devices, according to the
Qi standard, achieving extremely low standby power consumption. If a Qi-compliant
receiver is detected, the NXQ1TXA5 starts to communicate with it. If the receiver is
recognized, it safely initiates wireless power transfer from the transmitter to the receiver,
while monitoring for fault conditions such as overheating or interference from metal
objects. The device is optimized to operate from a USB power supply and uses Smart
Power Limiting (SPL) to adjust the output power automatically to compensate for
power-limited supplies. The device supports Foreign Object Detection (FOD).
LED outputs and a buzzer output are available for the user interface. The LED outputs
feature a number of blinking modes. Static Power Reduction (SPR) allows multiple
NXQ1TXA5-based transmitters to operate from a single USB power supply by limiting
power consumption per device.
The NXQ1TXA5 is available in a 5 mm  5 mm, 32-pin HVQFN package.
2. Features and benefits
 One-chip WPC 1.1.2 Qi-compliant device for A5/A11/A12/A16 5 V single-coil
low-power transmitter
 Operates from 5 V supply
 Integrated high-efficiency full-bridge power stage with low EMI radiation meeting
EN55022 radiated and conducted emission limits
 Very few external components required, minimizing cost and board space
 Extremely low-power receiver detection circuitry; standby power 10 mW (typical)
 Power stage fully protected against overcurrents and overtemperature
 Fully integrated accurate coil current measurement
 Demodulates and decodes communication packages from Qi-compliant receivers
 PID regulation for closed-loop power drive and control
 Internal 1.8 V digital supply generation
 LED (2) and buzzer outputs
 NTC input for external temperature check and protection
 On-chip thermal protection
 Small HVQFN 32-pin package (5  5 mm) with 0.5 mm pitch